Robot cleaner



FIG. 1 is a perspective view of a robot cleaner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a perspective view showing the state in which brushes have been attached to the lower part of the robot cleaner.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a robot cleaner, as shown and described. 